According to Mormonism, the church fathers did not have priesthood authority. The Priesthood (Aaronic and Melchizedek) was taken from the earth.
"When individuals or groups of people turn away from the principles of the gospel, they are in a state of apostasy. One example is the Great Apostasy, which occurred after the Savior established His Church. After the deaths of the Savior and His Apostles, men corrupted the principles of the gospel and made unauthorized changes in Church organization and priesthood ordinances . Because of this widespread apostasy, the Lord withdrew the authority of the priesthood from the earth. This apostasy lasted until Heavenly Father and His Beloved Son appeared to Joseph Smith in 1820 and initiated the restoration of the fulness of the gospel."
Apostasy
(lds.org is their official website at this time --- March 2019)
Book of Mormon, 1 Nephi 13
1 And it came to pass that the angel spake unto me, saying: Look! And I looked and beheld many nations and kingdoms.
2 And the angel said unto me: What beholdest thou? And I said: I behold many nations and kingdoms.
3 And he said unto me: These are the nations and kingdoms of the Gentiles.
4 And it came to pass that I saw among the nations of the Gentiles the formation of a great church.
5 And the angel said unto me: Behold the formation of a church which is most abominable above all other churches, which slayeth the saints of God, yea, and tortureth them and bindeth them down, and yoketh them with a yoke of iron, and bringeth them down into captivity.
6 And it came to pass that I beheld this great and abominable church; and I saw the devil that he was the founder of it.
7 And I also saw gold, and silver, and silks, and scarlets, and fine-twined linen, and all manner of precious clothing; and I saw many harlots.
8 And the angel spake unto me, saying: Behold the gold, and the silver, and the silks, and the scarlets, and the fine-twined linen, and the precious clothing, and the harlots, are the desires of this great and abominable church.
9 And also for the praise of the world do they destroy the saints of God, and bring them down into captivity.
10 And it came to pass that I looked and beheld many waters; and they divided the Gentiles from the seed of my brethren.
11 And it came to pass that the angel said unto me: Behold the wrath of God is upon the seed of thy brethren.
12 And I looked and beheld a man among the Gentiles, who was separated from the seed of my brethren by the many waters; and I beheld the Spirit of God, that it came down and wrought upon the man; and he went forth upon the many waters, even unto the seed of my brethren, who were in the promised land.
13 And it came to pass that I beheld the Spirit of God, that it wrought upon other Gentiles; and they went forth out of captivity, upon the many waters.
14 And it came to pass that I beheld many multitudes of the Gentiles upon the land of promise; and I beheld the wrath of God, that it was upon the seed of my brethren; and they were scattered before the Gentiles and were smitten.
15 And I beheld the Spirit of the Lord, that it was upon the Gentiles, and they did prosper and obtain the land for their inheritance; and I beheld that they were white, and exceedingly fair and beautiful, like unto my people before they were slain.
16 And it came to pass that I, Nephi, beheld that the Gentiles who had gone forth out of captivity did humble themselves before the Lord; and the power of the Lord was with them...
20 And it came to pass that I, Nephi, beheld that they did prosper in the land; and I beheld a book, and it was carried forth among them.
21 And the angel said unto me: Knowest thou the meaning of the book?
22 And I said unto him: I know not.
23 And he said: Behold it proceedeth out of the mouth of a Jew. And I, Nephi, beheld it; and he said unto me: The book that thou beholdest is a record of the Jews, which contains the covenants of the Lord, which he hath made unto the house of Israel; and it also containeth many of the prophecies of the holy prophets; and it is a record like unto the engravings which are upon the plates of brass, save there are not so many; nevertheless, they contain the covenants of the Lord, which he hath made unto the house of Israel; wherefore, they are of great worth unto the Gentiles.
24 And the angel of the Lord said unto me: Thou hast beheld that the book proceeded forth from the mouth of a Jew; and when it proceeded forth from the mouth of a Jew it contained the fulness of the gospel of the Lord, of whom the twelve apostles bear record; and they bear record according to the truth which is in the Lamb of God.
25 Wherefore, these things go forth from the Jews in purity unto the Gentiles, according to the truth which is in God.
26 And after they go forth by the hand of the twelve apostles of the Lamb, from the Jews unto the Gentiles, thou seest the formation of that great and abominable church, which is most abominable above all other churches; for behold, they have taken away from the gospel of the Lamb many parts which are plain and most precious; and also many covenants of the Lord have they taken away.
27 And all this have they done that they might pervert the right ways of the Lord, that they might blind the eyes and harden the hearts of the children of men.
28 Wherefore, thou seest that after the book hath gone forth through the hands of the great and abominable church, that there are many plain and precious things taken away from the book, which is the book of the Lamb of God.
29 And after these plain and precious things were taken away it goeth forth unto all the nations of the Gentiles; and after it goeth forth unto all the nations of the Gentiles, yea, even across the many waters which thou hast seen with the Gentiles which have gone forth out of captivity, thou seest—because of the many plain and precious things which have been taken out of the book, which were plain unto the understanding of the children of men, according to the plainness which is in the Lamb of God—because of these things which are taken away out of the gospel of the Lamb, an exceedingly great many do stumble, yea, insomuch that Satan hath great power over them.
1 Nephi 13